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I'm a well-known mainframe performance guy, with almost 30 years of experience helping customers manage systems. I also dabble in lots of other technology. I've sought to widen the Performance role, incorporating aspects of infrastructural architecture.

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It's been a while since I last posted here. And that's been more a matter of being incredibly busy than anything. Some of you will have seen me "on stage" - there having been several conferences and user groups recently. Some of you were with me at the zChampions meeting and some of you I'm actively working on customer situations with.
(By the way one of the rules of zChampions isn't... [More]

Now with free map , this is the concluding part of a four part series on batch parallelisation, with especial focus on cloning.
In previous parts I discussed:
Motivation
Classification
Issues
This part wraps up with thoughts on implementation. I'm going to break it down into:
Analysis
Making Changes
Monitoring
While there probably are... [More]

One of the nice enhancements in z/OS Release 13 JES2 was the support for SYSIN in a JCL procedure. (See here for the announcement letter.) I have a personal example of where it would've been handy. You probably have your own. We used to distribute sample JCL to use DB2 DSNTIAUL to unload the DB2 Catalog, one table at a time. Obviously with such a repetitive use in a single job step you'd want... [More]

Thanks to Scott Drummond for reminding me of last Autumn's DFSORT Function PTFs - UK90025 and UK90026. They're mentioned in the preview for z/OS Release 13 so now is not such a bad time to be talking about them. So let me pick out a few highlights: Translation Between ASCII And EBCDIC, And To And From Hex and Binary For a long time DFSORT has been able to translate to upper case (TRAN=LTOU), to... [More]